Device for cutting or resurfacing metal



E. Mavis. DEVICE FOR CUTTING 0R RESUBFACING METAL.

APPLICATION FILED FEBAZI. 192i.

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EIN() JARVTS, 0F TORONTO, ONTARIO, CANADA.

Application filed February 21, 1921.

T 0 all wlw/m t may concern:

Be it known that l, Emo Jarvis, a British subject, residing at the city of Toronto, in

the county of York and Province of Ontario, Dominion of Canada, have invented certain new and useful improvements in Devices for Cutting or Resurfacing Metal; and l hereby declare that the following is a full, clear, and exact description of the same.

This invention relates to a tool specially adapted for resurfacing metal and more particularly adapted for reseating valves of internal combustion engines, and to that end it consists of a simple and convenient arrangement and combination of parts which will be more fully hereinafter described and claimed.

ln the drawings.

F ig. l, is a side elevation, ig. 2, 1s a top plan view of the device, and Fig. 3, is a central vertical section showing a valve in position for reseating.

Referring to the drawings 1, is an elongated cylindrical member provided at its upper' end with the radial arms 2, preferably three in number, the upper surfaces of which are in the same plane and provided with the lengthwise grooves or channels 3. One side of each of these channels 3, is substantially in line with the central aXis of the cylindrical member 1, and slidably mounted in these grooves or channels 3, are the cutters el, the cutting edges or sides 5, of which abut against and are maintained in line with the axis of the cylindrical member 1, by the sides of the grooves or channels 3.

6, represents a removable and interchangeable bushing having a bore of substantially the same diameter as the valve stem 7 of the valve 8, such valve stem 7, being slidable and rotatable in the bore of the bushing 6, which is held rigidly in position within the cylindrical member 1, by the locking` screw 9.

A spring l0, is inserted in the bore of the cylindrical member 1 and rests upon the upper surface of the bushing 6, to disengage the work from the cutters when the abrading pressure is removed from the work. The valve stem 7, passes through the spring 10, and the bore of the bushing 6, which cor rectly centers the stem 7 and its valve 8. The spring 10, pressing against the valve 8 and tending to lift it off the cutters when the pressure is removed during the abrading operation.

Serial No. 448,557.

The cutters 5, are each provided with individual clamps 11, adjustable on the arms 2, and formed through the head 20, of each clamp `11, is a` screw-'threaded hole 12, in which operates a clamping screw 13 to engage and hold the cutter in its set position, and bind the clamp againstits respective arm.

Each clamp 11,`consists of a substantially lll-shaped strap 11a, and the head 20, to vwhich the free ends of the strap are secured. The internal dimensions of each clamp 11, correspond approximately to the external dimensions of its respective arm to engage its sides and form a tight iittingbut sliding contact therewith. ln the head 2O of each clamp, is a through slot 21, oppose` to the groove or channel 8, of its respective arm 2. When the parts are assembled the slot 21, and groove or channel 3 torni a slideway for their respective cutter 5, which is of substantially the same width as the slot and groove, and maintain the cutting edge of the cutter in line with the center of the cylindrical member 1.

At the outer end of each arm 2, is a plate 14, extending above the top surface of the arm and formed therethrough is a screwthreaded hole 15, and operating through this hole is a setting-screw 16, the inner end of which engages the cutter 5 and presses it into and holds it in contact with the work. At the outer end of each setting-screw is a milled head 17, for its manipulation, and on each setting-screw 16, is a lock-nut 18, to engage its respective plate lll, and hold the settingscrew against rotation.

By turning the valve 8 with a brace or other equivalent means, the cutting edges of the cutters abrade the surface with which they are in contact and cut it smoothly and uniformly throughout its circumference.

The cylindrical member 1, carrying the operative parts, is rigidly held in the vise 19, or any other suitable anchoring device.

is a concrete example of the application of my invention, the device is shown as designed for reseating valves having bevelled edges, but it may be designed to operate upon a flat or other surface, and it is to be understoodk that the invention is not to be confined to any particular shape of the cutting edges of the cutters, or to any particular class of work.

Having now particularly described and ascertained the nature of my invention, and

in what manner the same is to be performed, I declare that What I claim is l. A device 'for cutting or resurfacing metal comprising a cylindrical member provided at one end with a set of arms formed With eutte holding' grooves radial to its axis, removable bushing inserted in the bore of said member to center the Work, a spring engaging the end of the bushing for lifting` tie Work from the cutter, a radially adjustable cutter contained in each of said grooves. an individual clamp for each cutter hai/ing a through slot aligned Withl its respective cutter holding1 groove, and a setting; screw for radialljT adjusting each cutter to the axis of said cylindrical member.

2. A device for cutting or resurfacing metal Comprising a cylindrical member provided at one end with a set of arms formed with cutter holding grooves radial to its axis, a removable bushing inserted inl the bore of said member to center the Work, a spring engaging` the end of the bushing for lifting the Work from the cutter, a radially adjustable cutter contained in each of said grooves, an individual clamp for each cutter having` a through slot aligned With its respective cutter holding groove, a setting screw for radially adjusting` each critter to the axis of said cylindrical member, and a locking` screw for holding` each cutter in its set position.

Dated this 17th day of February A. D.

. EIN() J ARVTS. In the presence of- CHAS. H. RIGHES, WVM. T. MILLER. 

